#1  
01-07-2023, 04:09 PM
Choomba696 Choomba696 is offline
Free Member
 
Join Date: Jan 2023
Posts: 3
Thanked 0 Times in 0 Posts
I want to know which interpolation is best used when resizing DVD video to 540p. Lanczos? Spline64?
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Ads / Sponsors
 
Join Date: ∞
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #2  
01-07-2023, 06:31 PM
lordsmurf's Avatar
lordsmurf lordsmurf is offline
Site Staff | Video
 
Join Date: Dec 2002
Posts: 13,830
Thanked 2,503 Times in 2,128 Posts
It fully depend on content.

You can put most things into 3 buckets:
- bad
- not bad, but not great (passable)
- good, excellent

Right now, you're discussing things in that last/best bucket. At this stage, it starts to be nuanced, situation based, even preference.

- Did my advice help you? Then become a Premium Member and support this site.
- For sale in the marketplace: TBCs, workflows, capture cards, VCRs
Reply With Quote
  #3  
01-07-2023, 11:29 PM
Choomba696 Choomba696 is offline
Free Member
 
Join Date: Jan 2023
Posts: 3
Thanked 0 Times in 0 Posts
The source material I'm converting is good quality. Mainstream DVDs. What's the best method for that situation? Also I want to know what QTGMC preset I should use for deinterlacing. Should I use Faster or Fast? I'm kinda torn between the two.
Reply With Quote
  #4  
01-08-2023, 06:53 AM
lordsmurf's Avatar
lordsmurf lordsmurf is offline
Site Staff | Video
 
Join Date: Dec 2002
Posts: 13,830
Thanked 2,503 Times in 2,128 Posts
For this decision, I'd suggest learning more about QTGMC.

QTGMC is not "a filter", but more like a controller for multiple filters being called up. Which filter is called, and those settings, determines quality. You can manually enable via switches, or you can choose presets.

Look at the actual script:
https://raw.githubusercontent.com/re...0up/QTGMC.avsi

In particular, this part:
Code:
#                                                               Very                                                        Very      Super      Ultra
    # Preset groups:                                     Placebo    Slow      Slower    Slow      Medium    Fast      Faster    Fast      Fast       Fast       Draft
    TR0          = default( TR0,          Select( pNum,  2,         2,        2,        2,        2,        2,        1,        1,        1,         1,         0      ) )
    TR1          = default( TR1,          Select( pNum,  2,         2,        2,        1,        1,        1,        1,        1,        1,         1,         1      ) )
    TR2X         = default( TR2,          Select( pNum,  3,         2,        1,        1,        1,        0,        0,        0,        0,         0,         0      ) )
    Rep0         = defined(Rep0) ? Rep0 : TR0 < 1 ? 0 : undefined()
    Rep0         = default( Rep0,         Select( pNum,  4,         4,        4,        4,        3,        3,        0,        0,        0,         0,         0      ) )
    Rep1         = default( Rep1,         Select( pNum,  0,         0,        0,        0,        0,        0,        0,        0,        0,         0,         0      ) )
    Rep2         = default( Rep2,         Select( pNum,  4,         4,        4,        4,        4,        4,        4,        4,        3,         3,         0      ) )
    EdiMode      = default( EdiMode,      Select( pNum, "NNEDI3",  "NNEDI3", "NNEDI3", "NNEDI3", "NNEDI3", "NNEDI3", "NNEDI3", "NNEDI3", "NNEDI3",  "RepYadif","Bob"   ) )
    NNSize       = default( NNSize,       Select( pNum,  1,         1,        1,        1,        5,        5,        4,        4,        4,         4,         4      ) )
    NNeurons     = default( NNeurons,     Select( pNum,  2,         2,        1,        1,        1,        0,        0,        0,        0,         0,         0      ) )
    EdiQual      = default( EdiQual,      Select( pNum,  1,         1,        1,        1,        1,        1,        1,        1,        1,         1,         1      ) )
    EdiMaxD      = default( EdiMaxD,      Select( pNum,  12,        10,       8,        7,        7,        6,        6,        5,        4,         4,         4      ) )
    SMode        = default( SMode,        Select( pNum,  2,         2,        2,        2,        2,        2,        2,        2,        2,         2,         0      ) )
    SLModeX      = default( SLMode,       Select( pNum,  2,         2,        2,        2,        2,        2,        2,        2,        0,         0,         0      ) )
    SLRad        = default( SLRad,        Select( pNum,  3,         1,        1,        1,        1,        1,        1,        1,        1,         1,         1      ) )
    Sbb          = default( Sbb,          Select( pNum,  3,         1,        1,        0,        0,        0,        0,        0,        0,         0,         0      ) )
    SrchClipPP   = default( SrchClipPP,   Select( pNum,  3,         3,        3,        3,        3,        2,        2,        2,        1,         1,         0      ) )
    SubPel       = default( SubPel,       Select( pNum,  2,         2,        2,        2,        1,        1,        1,        1,        1,         1,         1      ) )
    Blocksize    = default( Blocksize,    Select( pNum,  bs,        bs,       bs,       bs,       bs,       bs,       bs2,      bs2,      bs2,       bs2,       bs2    ) )
    bs = Blocksize
    Overlap      = default( Overlap,      Select( pNum,  bs/2,      bs/2,     bs/2,     bs/2,     bs/2,     bs/2,     bs/2,     bs/4,     bs/4,      bs/4,      bs/4   ) )
    Search       = default( Search,       Select( pNum,  5,         4,        4,        4,        4,        4,        4,        4,        0,         0,         0      ) )
    SearchParam  = default( SearchParam,  Select( pNum,  2,         2,        2,        2,        2,        2,        2,        1,        1,         1,         1      ) )
    SearchParam  = ESearchP && (Search==4 || Search==5) ? pNum < 4 ? 24 : pNum < 8 ? 16 : SearchParam : SearchParam
    PelSearch    = default( PelSearch,    Select( pNum,  2,         2,        2,        2,        1,        1,        1,        1,        1,         1,         1      ) )
    ChromaMotion = default( ChromaMotion, Select( pNum,  true,      true,     true,     false,    false,    false,    false,    false,    false,     false,     false  ) )
    Precise      = default( Precise,      Select( pNum,  true,      true,     false,    false,    false,    false,    false,    false,    false,     false,     false  ) )
    ProgSADMask  = default( ProgSADMask,  Select( pNum,  10.0,      10.0,     10.0,     10.0,     10.0,     0.0,      0.0,      0.0,      0.0,       0.0,       0.0    ) )
Now, to understand what TR0/1/2 is, etc, you'll want to refer to the official wiki
http://avisynth.nl/index.php/QTGMC

There's really not much different between "fast" and "faster" presets, mostly some housekeeping to the motion search refinement, and increased radius to TR0.

BTW, you can call up a preset, then add switches/syntax to alter or add the variable. So, for example, you could call up "faster" and then chase it with a TR0=2 to match the slower "fast" preset, and leave other fast vs. faster changes alone.

Does this all make sense?

Given your source, faster is probably fine. It's what I'd normally do in this situation.

- Did my advice help you? Then become a Premium Member and support this site.
- For sale in the marketplace: TBCs, workflows, capture cards, VCRs
Reply With Quote
  #5  
01-09-2023, 04:24 AM
Choomba696 Choomba696 is offline
Free Member
 
Join Date: Jan 2023
Posts: 3
Thanked 0 Times in 0 Posts
It's beggining to make more sense to me. This deinterlacer is complicated. I noticed that Lanczos leave a larger file than bilinear. Does it mean more detail retention?
Reply With Quote
Reply




Tags
avisynth, hybrid, vapoursynth, x264

Similar Threads
Thread Thread Starter Forum Replies Last Post
What to resize 720x576 PAL to? Should I resize? CZbwoi Restore, Filter, Improve Quality 6 02-26-2021 05:35 PM
Hybrid environment: Blackmagic 10-bit captures to Avisynth? spokenward Capture, Record, Transfer 6 12-14-2017 12:35 AM
HuffYUV multithreaded + hyperthreading faster? Towncivilian Encode, Convert for discs 5 04-26-2016 07:29 AM
Is firewire 400/800 faster than USB 2.0? Sossity Computers 1 12-16-2010 12:16 PM
Faster encoding... Superstar Encode, Convert for discs 5 11-05-2009 07:25 PM

Thread Tools



 
All times are GMT -5. The time now is 02:22 AM